A.a manual closed loop
B.a manual opened loop
C.an automatic closed loop
D.an automatic opened loop
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A.the absolute pressure
B.the gauge pressure
C.the vacuum pressure
D.the differential pressure
A.measured
B.recorded
C.transferred
D.controlled
A.a current will flow
B.a power will develop
C.a heat will flow
D.a pressure will produce
A.Reverse current protection
B.Reverse power protection
C.Synchronising device
D.Frequency meter
A.two frequencies must be brought into phase
B.the incoming machine accepts a small amount of load
C.the running machine must be unload
D.both voltages are equal
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